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UUID Generator

Developer Tools

Batch UUID v4 generation with multiple formats

Quick Answer

UUID Generator: Batch UUID v4 generation with multiple formats. 128-bit, format 8-4-4-4-12 hex; 122 random bits.

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How to Use

  1. Paste or type content: drop code/text into the UUID Generator or fill the parameters.
  2. Choose mode/options: switch format, rules or processing as needed.
  3. Live output: results appear instantly — nothing is submitted, data stays in your browser.
  4. One-click copy: copy the output straight into your development environment.

Key Points

  • UUID Generator is a free online developer tool — open and use, no sign-up.
  • All calculations run locally in your browser; your data never leaves the device.
  • Key capability: Batch UUID v4 generation with multiple formats.
  • Results come with formulas and reference tables so you can verify every number.

Formula & How It Works

UUID v4 (RFC 4122)

128-bit, format 8-4-4-4-12 hex; 122 random bits
Version digit fixed at 4; variant digit ∈ {8,9,a,b}
Collision: ~50% chance only after 2.71×10¹⁸ UUIDs

FAQ

How do I use the UUID Generator?
Open the page and fill in the input fields — results update automatically. Batch UUID v4 generation with multiple formats.
Are the results accurate?
Yes. Standard formulas and conversion factors are used and verified.
Is it free? Do I need to sign up?
Completely free. No registration, login or download required.
Does it work on mobile?
Yes. The responsive design works on phones, tablets and desktops.
Is my data saved?
No. Everything runs locally in your browser.

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Source & Updates

Based on RFC 4648, ECMA-262 and related specifications. Last updated: 2025-07

Authoritative sources:

Last updated:

Formulas and content on this page are reviewed by the YiJianSuan team. For reference only — official sources prevail.

Cite this page: YiJianSuan. UUID Generator[EB/OL]. https://www.yijiansuan.com/en/c/dev/uuid

Results provided by this tool are for reference only and do not constitute professional advice.